Performance calibration device and calibration method for interdigital transducer
An interdigital transducer and interdigital transducer technology, applied in the field of sensors, can solve the problem of large randomness, poor signal repeatability and comparability, and difficulty in angular force between the capillary glass tube and the calibration device and the accuracy of the position. Control and other issues to reduce randomness, achieve repeatability, and facilitate optimization research.
Active Publication Date: 2021-08-03
JIANGSU UNIV
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Problems solved by technology
[0005] If the vacuum capillary glass tube is broken by hand, it is difficult to control the angle between the vacuum capillary glass tube and the calibration device, the force when breaking, and the accuracy of the position when it is broken manually. The randomness is very large, and the repeatability and comparability of the signal Poor, so a flexible and stable performance calibration device for interdigital transducers is needed
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[0038] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0039] In describing the present invention, it is to be understood that the terms "central", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "axial", The orientation or positional relationship indicated by "radial", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description , rather than indicating or implying that the device or elem...
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Abstract
The invention provides a calibration device and a calibration method for an interdigital transducer. The calibration device comprises a calibration platform and a calibration signal generating device, wherein the calibration platform is cylindrical; the calibration signal generating device comprises a supporting bracket, a pressing rod, a cross beam and a vacuum capillary glass tube, the two ends of the cross beam are supported on the supporting bracket, the cross beam is located above the calibration platform, the vacuum capillary glass tube is installed at the tail end of the pressing rod, the pressing rod is installed on the cross beam, the vacuum capillary glass tube can be broken by rotating the pressing rod, and when the vacuum capillary glass tube is broken, the included angle between the axis of the vacuum capillary glass tube and the upper surface of the calibration platform is 30 degrees. According to the invention, the calibration of the dynamic and static performance of the interdigital transducer has comprehensiveness, stability, repeatability and comparability.
Description
technical field [0001] The invention relates to the technical field of sensors, and relates to a performance calibration device and a calibration method for interdigital transducers. Background technique [0002] The interdigital transducer (Interdigital Transducer, IDT) is the basic component of the surface acoustic wave device, and it has been gradually used in guided wave detection for structural health monitoring in recent years. The common calibration method of interdigital transducers is to start from the sensor category and test the static performance of sensors such as linearity, sensitivity and hysteresis, ignoring the orientation, frequency selectivity and effective distance of interdigital transducers. The dynamic calibration of characteristics, etc., this universal calibration method for sensors cannot meet the characteristic requirements of interdigital transducer calibration, and there is a lack of a unique device for interdigital transducers to calibrate its b...
Claims
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Login to View More IPC IPC(8): G01N29/30
CPCG01N29/30
Inventor 王自平周爱郝东辉王嘉涛章月殷贺
Owner JIANGSU UNIV